Understanding Supraperiosteal vs. Subperiosteal Dissection After Arcus Marginalis Release
Clarification of Anatomical Planes
No, dissecting on the bony surface after arcus marginalis release creates a supraperiosteal pocket, not a subperiosteal plane—the periosteum remains attached to the bone, and the dissection proceeds superficial to (above) the periosteum. 1
Anatomical Layers and Terminology
The confusion arises from the directional terminology:
- Supraperiosteal dissection means working in the plane above the periosteum, with the periosteum remaining adherent to the underlying bone 1, 2
- Subperiosteal dissection means elevating the periosteum off the bone and working in the plane beneath the periosteum, directly on the bony surface 3
- When surgeons describe "working directly on the bony surface" after arcus marginalis release, they are referring to the visual landmark of the orbital rim bone, not the actual dissection plane 1
The Arcus Marginalis Release Technique
The arcus marginalis is the periosteal attachment along the inferior orbital rim where the orbital septum fuses with the periosteum:
- The release involves incising through the arcus marginalis attachment at the orbital rim level 1, 2
- After this release, the subseptal orbital fat is advanced and the pocket created extends over the intact periosteum covering the maxillary bone 1
- The dissection remains supraperiosteal—the periosteum is left undisturbed on the bone surface 2
Why the Periosteum is Preserved
Multiple technical reasons support supraperiosteal rather than subperiosteal dissection in this context:
- Preserving the periosteum maintains the blood supply to the overlying soft tissues 3
- The mucosal detachment technique specifically emphasizes leaving periosteum intact (approximately 0.3 mm) to maintain supraperiosteal blood flow 3
- Subperiosteal elevation would risk injury to neurovascular structures and increase bleeding complications 4
Common Pitfall to Avoid
Do not confuse "working on the bony surface" with subperiosteal dissection—the former describes the anatomical depth reached (down to the level where bone is palpable through periosteum), while the latter describes violating the periosteal layer itself. 1, 2 In arcus marginalis release for midface rejuvenation, the goal is fat repositioning over an intact periosteal layer, not periosteal elevation. 1